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Antiplane shear waves from a piezoelectric strip actuator: exact versus effective boundary condition solutions

Bixing Zhang (Institutionen för tillämpad mekanik, Dynamik ; Extern) ; Anders Boström (Institutionen för tillämpad mekanik, Dynamik) ; Jonas Niklasson (Institutionen för tillämpad mekanik, Dynamik ; Institutionen för maskinteknik - Chalmers Lindholmen)
Smart materials and structures (0964-1726). Vol. 13 (2004), p. 161-168.
[Artikel, refereegranskad vetenskaplig]

A piezoelectric strip of finite width and thickness is placed on top of an isotropic half-space. It operates in actuator mode and a time harmonic voltage is thus applied across it. The piezoelectric material is of type 6mm oriented so that a 2D antiplane (scalar) problem results. By Fourier series expansions the problem is solved exactly and this result is compared to the case when the piezoelectric strip is replaced by an effective boundary condition, which is derived by series expansions in the thickness coordinate in the piezoelectric strip. At low frequencies the results agree very well and this corresponds to the situation usually found in practice. In general the effective boundary condition should be easier to apply and it is in particular noted that this is the case when using a FEM program where the option of a piezoelectric material is usually not available.

Nyckelord: piezoelectricity, vibrations, actuator, boundary conditions

Denna post skapades 2006-08-29. Senast ändrad 2015-03-30.
CPL Pubid: 2403


Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik (1900-2017)
Institutionen för maskinteknik - Chalmers Lindholmen (1999-2004)


Teknisk mekanik

Chalmers infrastruktur